The Boy Who Killed the Dif

From Author Wars - https://authorwars.com/books/the-boy-who-killed-the-dif-2467959.html

Overview:

Title: The Boy Who Killed the Dif
Author: Post Wheeler
Year: 1936
Type: Short Fiction

Editions/Publications:

Unknown. Giants & Witches and a Dragon or Two (Unknown, Post Wheeler, Alfred A. Knopf, xii+208 pages, Hardcover, Anthology)